public void ShouldBeValid_WhenNameIsValid(string name)
{
var actual = ProductName.TryCreate(name);
Check.That(actual)
.IsEqualTo(
Validation.Valid(new ProductName(name)));
}
public void ShouldBeInvalid_WhenHasInvalidCharacters(string name)
{
var actual = ProductName.TryCreate(name);
Check.That(actual)
.IsEqualTo(
Validation.Invalid <ProductName>(
new ProductName.InvalidCharactersValidationError()));
}
public void ShouldBeInvalid_WhenExceedsMaxLength()
{
var name = new string('e', ProductName.MaxLength + 10);
var actual = ProductName.TryCreate(name);
Check.That(actual)
.IsEqualTo(
Validation.Invalid <ProductName>(
new ProductName.ExceedsMaxLengthValidationError()));
}
public static void Demo(ILogger logger)
{
logger.Information("==== Demo for ValueObjectAttribute ====");
var bread = ProductName.Create("Bread");
logger.Information("Product name: {Bread}", bread);
string valueOfTheProductName = bread;
logger.Information("Implicit conversion of ProductName -> string: {Key}", valueOfTheProductName);
try
{
ProductName.Create(" ");
logger.Warning("This line won't be reached.");
}
catch (ValidationException)
{
logger.Information("ValidationException is thrown because a product name cannot be an empty string.");
}
var validationResult = ProductName.TryCreate("Milk", out var milk);
if (validationResult == ValidationResult.Success)
{
logger.Information("Product name '{Name}' created with 'TryCreate'.", milk);
}
// Thanks to setting "NullInFactoryMethodsYieldsNull = true"
var nullProduct = ProductName.Create(null);
logger.Information("Null-Product name: {NullProduct}", nullProduct);
var nullValidationResult = ProductName.TryCreate(null, out nullProduct);
if (nullValidationResult == ValidationResult.Success)
{
logger.Information("Null-Product name: {NullProduct}", nullProduct);
}
}
public Validation<UncreatedProduct> Validate()
{
var name = ProductName.TryCreate(Name);
var description = ProductDescription.TryCreate(Description);
var dimension = Dimension.Validate();
var weight = Shared.Domain.Weight.TryGrams(Weight);
var categories = ValidateCategories(CategoryIds);
var errors =
name.SafeGetErrors()
.Concat(description.SafeGetErrors())
.Concat(dimension.SafeGetErrors())
.Concat(weight.SafeGetErrors())
.Concat(categories.SafeGetErrors())
.ToList();
return errors.ToValidation(() =>
new UncreatedProduct(
name.Value,
description.Value,
dimension.Value,
weight.Value,
categories.Value));
}
public Validation <ProductName> Validate() => ProductName.TryCreate(Name);